After four years of implementing the new approach, Lincoln’s results were even more astounding: suspensions dropped 90%, there were no expulsions, and kids’ grades, test scores and graduation rates surged.

But many educators aren’t convinced. They ask: Can the teachers and staff at Lincoln explain what they did differently? Did it really help the kids who had the most problems – the most adverse experiences? Or is what happened at Lincoln High just a fluke? Can it be replicated in other schools?